Home / 21,469.11-29,621.31-13,915.75

Finding the Fourth Proportional to 21,469.11, 29,621.31 and 13,915.75

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Solution

The fourth proportional to 21,469.11, 29,621.31 and 13,915.75 is: 19,199.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,469.11 : 29,621.31 = 13,915.75 : x
  2. Step 2: Convert to fraction form
    21,469.11/29,621.31 = 13,915.75/x
  3. Step 3: Cross multiply
    21,469.11x = 29,621.31 × 13,915.75
  4. Step 4: Simplify right side
    21,469.11x = 412,202,744.63
  5. Step 5: Solve for x
    x = 412,202,744.63/21,469.11
  6. Step 6: Final answer
    x = 19,199.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.